JPH05329281A - Flame-retardant seat for vehicle - Google Patents

Abstract

PURPOSE:To enable recycling of the flame-retardant seat for vehicles and to lessen moistening and the generation of toxic gases at the time of combustion. CONSTITUTION:This flame-retardant seat for vehicles consists of side fabrics, wadding layers and cushion layers. The side fabrics and wadding layers consist of polyester fibers formed by copolymerizing a phosphorus-contg. ester formable compd. or polyester fibers contg. a phosphorous-contg. flame retardant. The cushion layers consist of a cushion material formed by mixing, dispersing and fusing stereoscopically crimped polyester fibers and thermally adhesive fibers having 150 to 220 deg.C m.p. to an integral structure. As a result, the seat for vehicles which has the lower feed of moistening, is flame-retardant, has a low toxicity index of combustion gases and high safety, has good heat resistance and permanent set resistance, allows recycling as a blank material and consequently, recovering in spite of use in a large amt. and lessens environmental pollution is obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant vehicle seat that is recyclable, has less stuffiness, and produces less toxic gas when burned.

[0002]

2. Description of the Related Art As a vehicle seat, a cushioning layer made of polyurethane and a side material lined with latex or the like is often used. This seat has excellent flattening resistance, cushioning properties, and is inexpensive, but has poor breathability, so it tends to get damp and lacks comfort. In addition, since it is easily combustible and the combustion gas generates a lot of toxic gas such as cyan gas and carbon monoxide gas, it is a cause of poisoning death at the time of vehicle fire. For this reason, it has been subjected to flame retardant treatment, but although the flame retardant becomes halogen-based, it becomes more flammable, but when it begins to burn, it becomes more dangerous because it produces more toxic gas such as hydrogen chloride gas. That is the actual situation. In addition, when discarded, the bulky and soft properties of urethane remain in the ground as they are, so there is a problem that it is difficult to landfill in large quantities, and it is incinerated. When incinerated, there is a problem that a large amount of toxic gas is generated and corrosion of the incinerator is remarkable as described above. In recent years, it seems that studies have begun to collect, decompose, and recycle, but due to the complexity such as separation from the side land and the wadding layer, the fact is that recycling is scarcely done due to the huge amount of use.

Further, a cushion material obtained by impregnating polyester fiber with urethane (Japanese Utility Model Laid-Open No. 62-59500, etc.) and latex are used (Japanese Patent Laid-Open No. 60-4878).
No. 1, etc.) have been proposed, but the fact is that the generation of toxic gas, difficulty in recycling, and flame-retardant measures have not been solved at all.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and reduces the complexity of sorting at the time of disposal,
It is an object of the present invention to provide a highly flame-retardant vehicle seat that is recyclable, has less stuffiness, and emits no toxic gas during combustion, and has high safety.

[0005]

[Means for Solving the Problems] A means for solving the above problems, that is, the present invention is a vehicle seat comprising a side layer, a wadding layer, and a cushion layer, wherein the side layer and the wadding layer are formed of a phosphorus-containing ester. Made of polyester fibers copolymerized with a hydrophilic compound or polyester fibers containing a phosphorus-containing flame retardant, the cushion layer is a three-dimensional crimped polyester fiber and a heat-bonding fiber having a melting point of 150 to 220 ° C. mixed and dispersed, and heat-bonded by thermoforming. A flame-retardant vehicle seat, characterized in that an adhesive component of a fiber is melted to form a contact point of the fiber, and the cushion material is integrally structured.

The polyester fibers referred to in the present invention are polyethylene terephthalate (PET) polybutylene terephthalate (PBT) and polyethylene naphthalate (PE).
N), polyethylene isophthalate (PEI), polycyclohexylene dimethylene terephthalate (PCHD
T) or the like and a copolymer polyester thereof or / and a block copolymer such as polytetramethylene glycol (PTMG), and various additives as necessary,
A modifier and a colorant may be contained. Furthermore, it may be dyed. It also includes a single component and a composite of different compositions.

The seat of the present invention is made of polyester fiber for the side material, the wadding layer (the stuffing layer between the side material and the cushion material) and the cushion layer for the purpose of recycling. With this configuration, if only the metal part is removed, it is possible to re-pelletize or decompose and recover the monomer. Also, problems in transportation can be alleviated by hot pressing because it is polyester rather than thermoplasticity. In the case of containing different components, such recycling cannot be performed, which is not preferable.

The flame-retardant polyester fiber comprising a phosphorus-containing ester-forming compound copolymerized or containing a phosphorus-containing flame retardant in the present invention means polyethylene terephthalate (P
ET), polybutylene terephthalate (PBT), polycyclohexylene dimethyl phthalate (PCHDT),
A fibrous molded product obtained by introducing or imparting a flame retardant containing phosphorus to a polyester having polyethylene naphthalate (PEN), etc. and a copolymerized polyester thereof as a main repeating unit by polycondensation, mixing molding, post-processing, etc. Can be illustrated.

In order to achieve the object of the present invention, it is particularly preferable to copolymerize a phosphorus-containing ester forming compound, for example, JP-A-51-82392 and JP-A-5-38293.
Examples include those exemplified in JP-A-5-7888 and JP-B-55-41610. Particularly, a polyester obtained by copolymerizing a carboxylic acid represented by the following chemical formula 1 as a part of an acid component is heat resistant and gelled. It is difficult and preferable in light resistance.

[0010]

[Chemical 1]

In the chemical formula ¹ , R ¹ and R ² are the same or different groups and are a hydrogen atom, (optionally a halogen atom) or a hydrocarbon group having 6 or less carbon atoms, and R ³ and R ⁴ are the same or different groups. in a hydrogen atom, the number 7 or less hydrocarbon group or a carbon - (R ⁵⁾ represents a group represented by _r H. R ⁵ is an ethylene, propylene or butylene group, r is an integer of 1 to 10, 1, m is 0 or an integer of 1 to 4, and n is 0, 1 or 2. ) In addition, as the phosphorus-containing flame retardant for modifying the flame retardance when used in the production of polyester, for example, various phosphoric acid esters, phosphorous acid esters, phosphonic acid esters, (halogen element if necessary) Having the above-mentioned phosphoric acid esters, or a polymer derived from these phosphorus compounds, or optionally a compound represented by the following chemical formula 2 (wherein R ⁶ and R ⁷ are hydrogen or a lower alkyl group) as a diol component. Examples thereof include polyarylphosphonates having a degree of polymerization of 6 or more, which are wholly or partially included.

[0012]

[Chemical 2] In Chemical formula 2, p and q are 0 or an integer of 1 to 4. Further, as a flame retardant for containing a phosphorus-containing flame retardant by post-processing an ordinary unmodified polyester fiber and a molded product thereof as required, for example, tris (dibromopropyl) phosphate, Phosphoric acid esters such as tris (dichloropropyl) phosphate, polybrominated triphenylphosphate, triphenylphosphite, tris (2,4dichlorophenyl) phosphite, tris (2,4dibromophenyl) phosphite In addition to such phosphorous acid esters, organic phosphorus compounds such as vinyl alkyl phosphonates and allyl haloalkyl phosphonates can be mentioned.

Phosphorus content in a flame-retardant polyester fiber (hereinafter abbreviated as flame-retardant polyester fiber) obtained by copolymerizing a phosphorus-containing ester-forming compound forming the flame-retardant fiber of the present invention or containing a phosphorus-containing flame retardant. Is usually 500-100
About 00 ppm is preferable. Particularly preferably, 1000
It is not less than ppm and not more than 5000 ppm.

However, it is more preferable not to use the halogen element as much as possible, since a halide is not generated during combustion. The side material and the wadding layer forming the seat of the present invention are made of flame-retardant polyester fiber, so that the seat can be made flame-retardant. The side material and the wadding layer having a material other than phosphorus, for example, a halogen material, are not preferable because they generate a large amount of toxic halides. In addition, when the flame-retardant is not achieved, there is a risk that the cushion layer will burn up significantly due to the candle effect even if the cushion layer is drip-shaped. Furthermore, there is a similar risk in the case of non-combustible land.

The cushion layer constituting the seat of the present invention is a product in which a three-dimensional crimped polyester fiber is used as a base material and is integrated with a thermal adhesive component having a melting point of 150 ° C. or higher and 220 ° C. or lower.
By using three-dimensional crimped polyester fiber as the base material, it imparts sublime and elasticity. Those that are not three-dimensional crimps are inferior in bulkiness and inferior in elasticity. The heat-bonding component of the heat-bonding fiber constituting the cushion layer of the seat of the present invention is made of polyester and has a melting point of 150 ° C or higher and 220 ° C or lower.

When the melting point is 150 ° C. or lower, the heat resistance is poor,
If the temperature is 220 ° C. or higher, the adhesive component is deteriorated by heating and the fluidity is lowered, which makes it difficult to drip and exhibits flammability, which is not preferable. Preferred melting point is 155 ° C or higher 210
By setting the temperature to be not higher than 0 ° C, preferably not lower than 160 ° C and not higher than 198 ° C, it becomes easy to impart heat-resistant and anti-settle property and drip easily, and flame retardation becomes easy.

As the heat-adhesive component of the heat-adhesive fiber used for the seat of the present invention, known ones such as PET-PEI copolymer, PBT-PBI and the like to which a component promoting crystallization is added can be used. In particular, it is preferable to use a polyester elastomer, which is significantly improved in settling resistance and elasticity.

The polyester elastomer is a block copolymer of a hard segment and a soft segment, and the hard segment includes PET, PEN and PB.
Examples of the soft segment include PTMG and polyhexamethylene glycol (PH).
MG), polypropylene glycol (PPG), polycaprolactam (PCL), etc. can be illustrated. A particularly preferred combination is PBT-PTMG, PEN-PTM.
Examples include G and PBT-PCL. The heat-adhesive component may be, for example, a fiber that is singly fibrillated, or a sheath component that is configured as a sheath core composite fiber using PBT, PET, PEN, or the like as a core component.

The cushion layer constituting the seat of the present invention is
Although it may be a single layer or a multi-layer, in the case of a single layer, it is preferable to use a flame-retardant polyester fiber in a portion in contact with the spring layer.

In the case of multiple layers, the soft layer (A),
It is preferably composed of three layers of a medium hard layer (B) and a hard layer (C), and the soft layer (A) in contact with the wadding layer is
By making the cushion layer soft and bulky, the touch is soft and the amount of deformation is large, so that the effect of improving ventilation can be added. The middle hard layer (B) has a function of a cushion body. It has elasticity, and is deformed under a low load, and is less likely to be deformed under a high load, so that it is possible to impart the effect of promoting ventilation due to the deformation and maintaining the body shape and reducing the feeling of depression. The hard layer (C) is in contact with the spring layer or in contact with the frame of the seat so that the hard layer (C) functions to control the form of the seat. Therefore, it is desirable that the hardness is 50 kg or more when compressed by at least 50%. The adhesive component constituting the cushion layer is preferably a polyester elastomer to enhance the above-mentioned effects.

In the base material of the layer (A), the static friction coefficient (μs) of each yarn is preferably at least 0.25 or less,
When it is 0.2 or less, soft touch and crimp recovery can be improved. The crimp is preferably a three-dimensional crimp. The layer B is preferably three-dimensional crimped. The base material of the (C) layer is
Only the three-dimensional crimped fibers or the mechanical crimps can be mixed in a range not exceeding at least the content of the three-dimensional crimped fibers. As for the denier of the base material of each layer, the A layer is preferably 3 to 10 denier because of its softness, and the B layer is preferably 6 to 20 denier because a cushioning function can be easily added. The layer C preferably has a thickness of 8 denier to 100 denier to provide hardness.
The bulk density of each layer is 0.03 g / cc or less for the A layer, 0.01 to 0.06 g / cc for the B layer, and 0.04 to 0.1 for the C layer.
0 g / cc is preferred. The cross-sectional shape is preferably a hollow cross-section, more preferably a modified cross-section or a modified hollow cross-section because it can impart more bending rigidity. The preferred content of the heat-bonding fiber is A layer 5 to 30%, B layer 20 to 50%, C layer 20 to 1
It is 00%. When the cushion layer has poor flame retardancy, it is preferable to use a three-dimensional crimped fiber made of the flame-retardant polyester or a mechanically crimped fiber.

The side fabric used for the seat of the present invention is not particularly limited, but examples of the woven fabric include jacquard, dobby, and pile woven fabric such as moquette, and the knitted fabric includes tricot, double russel, circular knit, and the like. A napped fabric that needs to prevent hair loss is preferably packed with a nonwoven fabric using a polyester elastomer to impart elasticity, slightly impair breathability, and can be integrally collected and recycled. The breathability of the side is 20 to 1
It may be 000 cc / cm ² / sec, preferably 50
~ 300 is good. These lateral sites can be obtained by a known method. The fiber cross section is not particularly limited, but the napped fabric preferably has a modified cross section.

As the wadding layer, a product obtained by processing the flame-retardant polyester fiber into a felt shape, a product obtained by forming a heat-bonded non-woven fabric, and / or a cloth can be used. Furthermore,
It may also be used as a lining for the lateral area. Breathability is 50 or more 10
It is preferably 00 cc / cm ² / sec or less.

An example of a method of manufacturing the seat of the present invention will be shown below. Flame-retardant polyester is used as a component of polyester.
2000 to 5000 with carboxylic acid represented by
It is obtained by a conventional method by copolymerizing with ppm. Then, spinning and drawing are carried out by a conventional method to obtain a multifilament. To form a staple, it is obtained by stretching, stretching, and cutting.
A three-dimensional crimped yarn can be obtained by an asymmetric cooling method, a composite spinning method, or the like. In order to make the side fabric, a knitted fabric is then formed by a conventional method and dyed and finished, or the yarn is dyed and spun and then spun into a knitted fabric and finished. Upholstered cloth such as moquette is preferable because it is difficult to lose hair when lined. The wadding layer can be obtained by, for example, mixing and opening the three-dimensional wound-layer staple and the composite fiber having a polyester elastomer as an adhesive component, forming an open web, and optionally heat-bonding by adding a needle punch.

The cushion layer is obtained, for example, by the following method. The polyester elastomer is prepared by a known method, for example, by charging dimethyl terephthalate, tetramethylene glycol and PTMG together with a small amount of a catalyst and an antioxidant, transesterifying and condensing them to obtain a PBT-PTMG block copolymer. Then, for example, using PBT obtained by a conventional method as the core component, a sheath core fiber is obtained at 265 ° C. by a known composite spinning machine. When the Tm of the polyester elastomer is 180 ° C. or less, water cooling can prevent fusion. The unstretched yarn thus obtained is stretched at a temperature at which it is not fused, mechanically crimped and then cut to obtain a heat-bonded fiber.

The base material is obtained by a usual method. For example, PET
Using a hollow or irregularly shaped hollow nozzle, asymmetric cooling or composite spinning is performed to obtain an unstretched yarn with latent crimping capability and stretching, and then three-dimensional crimping is effected and cut, or three-dimensional crimping is performed after cutting. It is made to express and a base material is obtained. The preferred stretching is a multi-stage high temperature high tension stretching to impart high modulus retention. The friction coefficient can be lowered by adding a lubricating oil agent during or after stretching.

The heat-bonded fibers thus obtained and the base material are pre-opened by a conventional method, for example, at a mixing ratio of 30/70, and opened and laminated with a card to obtain a web having a desired basis weight. The opening is preferably performed by using an air ray because it can promote randomization. Then, continuously or if necessary, the cut web is compressed to 2/3 to 3/4 of the desired bulk so as to be slightly higher than the desired bulk, and heat-bonded to form each layer. Get the body. The heat fusion temperature is 5 to 5 below the melting point of the heat adhesive component.
It is preferable to raise the temperature by 30 ° C. More preferably, 10 to
When the temperature is raised by 20 ° C., contact formation is good and decomposition can be suppressed. The cushion layer is preferably integrated by mold molding, but when the cushion layer is molded without mold molding, it is compressed to a desired bulk after heat fusion, and a temperature lower than the melting point, preferably a thermal adhesive component. When using polyester elastomer when annealed at a temperature that promotes crystallization of
A product with significantly improved heat and fatigue resistance can be obtained. Alternatively, anneal after molding.

In the case of die molding, first, the A layer, the B layer, and the C layer, which are formed to have a volume slightly higher than a desired volume, are laminated on a female die, and hot press molding is performed with a male die. In the case of a single layer, it is preferable that the spring receiving material is a flame-retardant polyester fiber. The pressing temperature is preferably 5 to 10 ° C. higher than the melting point of the heat-adhesive component. The heating is preferably carried out by passing hot air or superheated steam through a die to the inside. The treatment time is preferably 1 minute before and after. The pressing pressure is preferably 10 kg or more. Then, it is cooled and the integrally molded cushion body is taken out from the mold. Preferably, it is then annealed at 100 to 160 ° C. When a polyester elastomer is used, heat resistance and sag resistance are significantly improved. It is also possible to mold with a laminated web instead of the molded body. When each layer of web is placed on the female die and the male die is used for the same molding, the heating temperature is the melting point of the thermal adhesive component +
The treatment time is preferably 10 to 20 ° C. and 3 minutes before or after. This method is preferably used for single layer cushions. Next, the cushion layer, the wadding layer, and the side ground formed on the seat frame are integrated to obtain the seat of the present invention.

The seat thus obtained is a vehicle seat which is recyclable, exhibits little stuffiness, exhibits flame retardancy in the event of a fire, has low toxicity of combustion gas, and is highly safe.
In addition, since it is possible to make it lighter than urethane, it also saves energy for both cars and trains. When polyester elastomer is used as the heat-adhesive component, the seat is suitable for vehicles because it can impart heat and settling resistance similar to urethane.

[0030]

The present invention will be described in detail with reference to the following examples.

[0031]

Example 1 Polyethylene terephthalate obtained by copolymerizing about 3000 ppm of the carboxylic acid represented by Chemical formula 1 as phosphorus as an acid component of polyester was obtained by a conventional method. This polymer was spun and drawn from a Y type orifice at 282 ° C. by a conventional method to obtain a filament of 36 filaments of 75 denier. The filament obtained is beaded, vertically knitted, raised, dyed and finished to give an air permeability of 100 cc.
A lateral ground (side ground A) of / cm ² / sec was obtained.

Using the same polymer as the side material, an undrawn yarn having cross-section anisotropy is spun at 282 ° C. from a C-orifice using an asymmetric cooling method, and after stretching, a tow-like relax heat treatment is performed to form a three-dimensional winding. A crimp was developed and cut into 64 mm to obtain a flame-retardant polyester staple (fiber A) having a crimp degree of 13 denier of 25% and a crimp number of 14 / inch.

Using unmodified PET, 75 denier / 36 filaments were prepared in the same manner as described above, and after knitting processing, the side material (side material) having an air permeability of 98 cc / cm ² / sec formed of unmodified PET was used. B) and 13 denier, and a staple (fiber B) having a three-dimensional crimp with a crimping degree of 27% and a crimping number of 13 crimps / inch were obtained. Dimethyl terephthalate (DMT) 645
Parts and 1.4 butanediol (1.4BD) 449 parts and polytetramethylene glycol (PT with a molecular weight of 2000)
1328 parts of MG) were charged together with an additive and a catalyst and polycondensed to obtain a polyester elastomer having a melting point of 189 ° C. This polymer is used as a sheath component, solvent is used at 220 ° C., and PBT is used as a core component. A fiber having a sheath core ratio of 50/50 is spun at a spinning temperature of 265 ° C., mechanically crimped after cutting, and set at 60 ° C. after cutting. 4.8 denier strength 3.8 g /
A heat-bonding fiber (bonding fiber A) having a d of 48% was obtained.

The fibers A and B were card-laid and laminated by needle punching to obtain wadding layers A and B having an apparent bulk of 0.015 g / cm ³ . Further, the adhesive fiber A and the fiber A are 1
0/90 Mixed fiber card Opening after stacking Apparent volume 0.01g / cm
³ to be heat-bonded by needle punching Kisakiinuinetsu 200 ° C., wadding layers one responsible cooling after 0.016 g / cm ³ to be annealed compressed after 130 ° C. 10 min 0.014 g / cm ³ C
Got The air permeability of each wadding layer is A: 210 cc /
cm ² / sec, B: 208 cc / cm ² / sec, C: 210
It was cc / cm ² / sec. Polyester obtained by charging dimethyl terephthalate (DMT), dimethyl isophthalate (DMI) and diethylene glycol (DEG) with 776 parts / 776 parts / 496 times each, 1242 parts / 310 parts / 496 parts together with a small amount of a catalyst and polycondensing. Had a melting point of 110 ° C and 180 ° C. Using the obtained polyester as the sheath component and PET as the core component, 2
A fiber having a sheath core ratio of 50/50 at 85 ° C. is spin-drawn by a conventional method, mechanical crimp is applied, and after cutting, the fiber is set at 60 ° C., and an adhesive fiber B using polyester having a melting point of 110 ° C.
And an adhesive fiber C using a polyester having a melting point of 180 ° C. was obtained.

PET having an intrinsic viscosity of 0.63 at 285 ° C.
Spinning was performed at a rate of 2 g / min and 6 g / min per single hole from the die nozzle, and spinning was performed from 30 mm directly below the nozzle at a wind speed of 2 m / sec. 0.7 times the breaking ratio (MDR), 0.85 times the MDR at 160 degrees Celsius, 0.95 times the MDR at 220 degrees Celsius
The drawn yarn obtained by stepwise length cooling was cut into 64 mm, and after opening, three-dimensional crimp was developed at 160 ° C., then slightly compressed and reheated at 200 ° C. to form a 4-denier base material A. A base material B of 13 denier was obtained. The base material A was provided with a slippery oil agent to lower the static friction coefficient of each yarn. As the base material B, a usual finishing oil was used. The characteristics are shown in Table 1.

[0036]

[Table 1]

The obtained adhesive fiber and base material were mixed with each other at 10/90 to 3
Mixing pre-spreading at a mixing ratio of 0/70 and then opening with a card, and basis weight 200 g / m ² , 1500 g / m ² , 1000 g / m ²
The laminated web was compressed and thermoformed to prepare a hard cotton body. Then, the obtained hard cotton body is placed on a preheated female mold for A
Layer B layer C layer are laminated in this order, pressed with a male die, and passed with hot air having a temperature higher than the melting point of the heat-adhesive component (while sucking).
Table 2 shows the method of treating the cushion layers of the seat and back obtained by annealing at 100 ° C. or 130 ° C. after molding for 50 seconds.

[0038]

[Table 2]

The obtained cushion layer was attached to the seat frame, the side ground and the wanding layer were attached, a seat was prepared, and the performance was evaluated. For comparison, a seat using commercially available urethane was also added.

The performance evaluation was carried out by the following method. Flame-retardant seat was set at 45 °, and afterflame length and burning time were measured according to the 45 ° mesenamine method. However, the afterflame length was judged by the length of the side ground surface or the length of the cushion bottom surface, whichever is longer. The results are shown as PASS and FAIL.

Combustion gas toxicity index Each combustion gas amount measured by the method of JIS-K-7217 in each part of the seat: unit mg / g, lethal dose after 10 minutes inhalation: unit mg / 10et The combustion gas toxicity index of the seat was calculated by converting the integrated value into the weight ratio of the seat.

Feeling of stuffiness Using 6 panelists, in a 35 ° C. R, H65% atmosphere, put a bicycle equivalent to 8 km / h for 10 minutes, and immediately apply 25
A sensation of stuffiness after sitting for 1 hour on a seat placed in an atmosphere of RH and 65% RH was sensory-evaluated. Less damp ○ A little damp △
The most common one was shown as the representative value of that seat, as markedly stuffy.

Heat and Settling Resistance The seat portion is placed in an atmosphere of 70 ° C. under a load of 50 kg and a diameter of 150 mm for 22 hours, left for 22 hours, unloading, and cooled for 24 hours. Thickness retention 50% or more ○, 30% or more △, 30 % Or less was evaluated as x.

As is clear from the above results, the present invention has low stuffiness, flame retardancy, low toxicity index and high safety. In addition, heat resistance and sag resistance were also good.
Those that deviated from the present invention were poor in heat resistance and settling resistance (Comparison-1) and poor in flame retardancy (Comparison-2, 3).
Further, the one using polyurethane for the wadding and the cushion layer had poor flame retardancy even when a flame-retardant material was used for the lateral side, and the toxicity index was high, and the safety was extremely low.
Moreover, the feeling of stuffiness was also bad.

As the heat-bonding fiber, the one obtained by the above-mentioned method with only PBT (bonding fiber D) was used (the molding temperature was 24
A cushion layer was formed in the same manner except that the press float of 5 ° C. was 240 ° C. and the annealing was 150 ° C.). (Cushion layer D) The color changed due to high temperature treatment. Table 3 shows the evaluation results
Also described in.

[0046]

[Table 3]

As is clear from the above results, the flame retardancy fails. In addition, the heat and settling resistance are slightly reduced. Inventive-1 and Comparative-1 were disassembled, crushed, decomposed with methanol in an autoclave and distilled to recover a monomer. The monomer recovery rates were both 92%.

The seat of the present invention thus obtained is a seat of extremely high safety, with little stuffy feeling, flame retardancy, and a low toxicity index of combustion gas. Furthermore, the seat is particularly suitable for vehicles because it has good heat resistance and settling resistance and can be recycled even if used in large amounts, and can reduce pollution and environmental pollution. Of course, it is also useful for furniture, beds and futons.

Claims (1)

[Claims] 1. A vehicle seat comprising a side layer, a wadding layer and a cushion layer, wherein the side layer and the wadding layer are polyester fibers copolymerized with a phosphorus-containing ester forming compound or a polyester fiber containing a phosphorus-containing flame retardant. The cushion layer is composed of three-dimensionally crimped polyester fibers and heat-bonding fibers having a melting point of 150 to 220 ° C. are mixed and dispersed, and the adhesive component of the heat-bonding fibers is melted by thermoforming to form a fiber contact, thereby forming an integrated structure. A flame-retardant vehicle seat, which is made of a cushion material.